Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88bf5da4d294f0fe17c29213936835969f065b7b3520191cd9152978e7baa40e' 
  AND token = '3f5sCAvaNNP3va0buDbKM2d6+1WATyA2gav4V/BJRjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}